Single and double storey extensions in Romford. Trusted, professional, 30+ years' hands-on experience.
GS Renovation designs and builds extensions across Romford, where the interwar semis and modern homes of RM1 sit on the generous plots typical of Havering's suburbs. With over 30 years of local building experience, we take on rear, side-return and wrap-around projects, from foundations through to a fully finished, decorated space.

The deep back gardens common to Romford's 1930s semis give real room to extend, which is why single storey rear and wrap-around extensions are so popular in RM1. We dig and pour the foundations, lay the groundworks, and build the shell, then install the steel beams that let us open the new addition into the existing kitchen or reception. Roof works, glazing and the full fit-out follow, all handled by one team.
Double storey extensions suit these houses too, adding a bedroom and a larger kitchen-diner while making the most of the wide plots. Because the properties are semi-detached, we consider the shared boundary from the outset, serve any party wall notices, and set the design to respect your neighbour's light and outlook. Everything structural is signed off by Havering building control as the work proceeds.
Not every Romford extension needs a planning application. Many single storey rear projects fall under permitted development, provided they stay within the size, height and boundary limits, which the generous RM1 plots often allow. Where a design goes beyond those rights, or where the house sits in a spot with restrictions, we make a full planning application to Havering Council and manage the drawings and submission for you.
Whichever route applies, building regulations always govern the structure, so foundations, beams, insulation and drainage are inspected regardless of the planning position. We advise honestly at the start on which path your property falls under, so there are no surprises. This clarity matters most on the interwar semis, where a wrap-around can quickly cross from permitted development into needing full permission.
Romford homeowners choose GS Renovation because we manage the whole extension, from foundations and steel to roof and decoration, under one roof. We advise clearly on whether your project is permitted development or needs a planning application to Havering Council, handle party wall matters on semi-detached boundaries, and keep building control informed. Over 30 years in RM1 backs every project.
George was brilliant. Lovely bloke, very reasonably priced and a perfectionist to boot. He completed our small kitchen renovation with care and great attention to detail. I've already recommended him to others.
Splendid job on our new kitchen refurb, including new flooring, moving the services, installing RSJ and preparing space for new back doors… George was always friendly, communicative and has an excellent attention to detail, ensuring everything is finished to a high standard.
Giorgio is an excellent and intelligent workman, and with very reasonable prices!… He paid a lot of attention to detail that is not common at all, and the final result was immaculate. Highly recommended!
FAQ
We price each Romford project individually, because the cost of house extensions depends on far more than floor area. After a free survey you receive a clear written breakdown with no hidden extras. Call 07472 424 226 or email info@gsrenovationltd.co.uk. As a rough guide, house extensions in London typically starts from roughly £40,000 for a single-storey rear extension and rises with size and specification (indicative London ranges, MyBuilder and Checkatrade, 2026). Your figure depends on the size, specification and condition of the property, which is why we survey before quoting.
How long house extensions takes in Romford depends on the size of the job, but we always agree a programme before starting and stick to it, keeping you informed from the first day to the last.
GS Renovation's team brings over 30 years of hands-on experience to house extensions and wider building work across Romford and the surrounding area. We offer free quotes, a dedicated project manager, full insurance, building control compliance where required, and comprehensive aftercare.
Many single-storey rear extensions in Romford fall under permitted development, but side returns, double-storey extensions and work in conservation areas usually need full planning permission. We assess your property and manage both the planning application and building control.
Yes. A large share of Romford's homes are 1930s and interwar properties, and we renovate them regularly. We plan each house extensions around their particular characteristics, such as cavity walls, regular original layouts and the generous plots that suit extending, so the result suits the building and meets building control.
It depends on the size and your property. Many single storey rear extensions on Romford's generous plots fall under permitted development, but larger, wrap-around or double storey designs often need a full planning application to Havering Council. We assess your house early and advise which route applies. Either way, building regulations govern the structure and building control signs it off.
We do. GS Renovation covers all of Romford and the RM1 area and the wider East London. Call 07472 424 226 and we will confirm we work on your road.
Every Service, One Team
The same trusted team, 30+ years' hands-on experience and free, no-obligation quotes apply to every GS Renovation service in Romford. Explore what else we do locally:
Steel beam installation, RSJ and structural alterations.
Safe load-bearing wall removal with steel beam support.
Structural alterations, new openings and steel support.
Chimney breast removal with gallows bracket or beam support.
Open-plan kitchen, diner and living conversions.
Full refurbishments and whole-house renovations.
Bespoke kitchen design and installation.
Luxury bathroom and wet-room refurbishment.
Same Service, Nearby Areas
We carry out house extensions across Romford and the surrounding areas. Explore a nearby location:
Contact GS Renovation today for a free, no-obligation quote for house extensions in Romford.
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